25. Many chemicals have a ________________ effect on the environment. (DISASTER)
28. I hope our____________will last throughout life.(FRIEND)
26. The island has been seriously _______________ by a copper mine. (POLLUTION)
27. The Internet has helped students study more___________. (EFFECTIVE)
25. disastrous : khủng khiếp
28. friendship : tình bạn
26. polluted : ô nhiễm
27. effectively : hiệu quả
25. Many chemicals have a disastrous effect on the environment.
28. I hope our friendship will last throughout life.
26. The island has been seriously polluted by a copper mine.
27. The Internet has helped students study more effectively.
học tốt!!